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-rw-r--r--lib/stdlib/src/unicode.erl677
1 files changed, 677 insertions, 0 deletions
diff --git a/lib/stdlib/src/unicode.erl b/lib/stdlib/src/unicode.erl
new file mode 100644
index 0000000000..09b1deff9c
--- /dev/null
+++ b/lib/stdlib/src/unicode.erl
@@ -0,0 +1,677 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(unicode).
+
+%% Implemented in the emulator:
+%% characters_to_binary/2 (will trap to characters_to_binary_int/2
+%% if InEncoding is not {latin1 | unicode | utf8})
+%% characters_to_list/2 (will trap to characters_to_list_int/2 if
+%% InEncoding is not {latin1 | unicode | utf8})
+%%
+
+-export([characters_to_list/1, characters_to_list_int/2, characters_to_binary/1,characters_to_binary_int/2, characters_to_binary/3,bom_to_encoding/1, encoding_to_bom/1]).
+
+
+characters_to_list(ML) ->
+ unicode:characters_to_list(ML,unicode).
+
+characters_to_list_int(ML, Encoding) ->
+ try
+ do_characters_to_list(ML,Encoding)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML,Encoding])),
+ erlang:raise(error,TheError,[{Mod,characters_to_list,L}|Rest])
+ end.
+
+% XXX: Optimize me!
+do_characters_to_list(ML, Encoding) ->
+ case unicode:characters_to_binary(ML,Encoding) of
+ Bin when is_binary(Bin) ->
+ unicode:characters_to_list(Bin,utf8);
+ {error,Encoded,Rest} ->
+ {error,unicode:characters_to_list(Encoded,utf8),Rest};
+ {incomplete, Encoded2, Rest2} ->
+ {incomplete,unicode:characters_to_list(Encoded2,utf8),Rest2}
+ end.
+
+
+characters_to_binary(ML) ->
+ try
+ unicode:characters_to_binary(ML,unicode)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML])),
+ erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
+ end.
+
+
+characters_to_binary_int(ML,InEncoding) ->
+ try
+ characters_to_binary_int(ML,InEncoding,unicode)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML,InEncoding])),
+ erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
+ end.
+
+characters_to_binary(ML, latin1, latin1) when is_binary(ML) ->
+ ML;
+characters_to_binary(ML, latin1, Uni) when is_binary(ML) and ((Uni =:= utf8) or (Uni =:= unicode)) ->
+ case unicode:bin_is_7bit(ML) of
+ true ->
+ ML;
+ false ->
+ try
+ characters_to_binary_int(ML,latin1,utf8)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML,latin1,Uni])),
+ erlang:raise(error,TheError,
+ [{Mod,characters_to_binary,L}|Rest])
+ end
+ end;
+characters_to_binary(ML,Uni,latin1) when is_binary(ML) and ((Uni =:= utf8) or (Uni =:= unicode)) ->
+ case unicode:bin_is_7bit(ML) of
+ true ->
+ ML;
+ false ->
+ try
+ characters_to_binary_int(ML,utf8,latin1)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML,Uni,latin1])),
+ erlang:raise(error,TheError,
+ [{Mod,characters_to_binary,L}|Rest])
+ end
+ end;
+
+characters_to_binary(ML, InEncoding, OutEncoding) ->
+ try
+ characters_to_binary_int(ML,InEncoding,OutEncoding)
+ catch
+ error:AnyError ->
+ TheError = case AnyError of
+ system_limit ->
+ system_limit;
+ _ ->
+ badarg
+ end,
+ {'EXIT',{new_stacktrace,[{Mod,_,L}|Rest]}} =
+ (catch erlang:error(new_stacktrace,
+ [ML,InEncoding,OutEncoding])),
+ erlang:raise(error,TheError,[{Mod,characters_to_binary,L}|Rest])
+ end.
+
+characters_to_binary_int(ML, InEncoding, OutEncoding) when
+ InEncoding =:= latin1, OutEncoding =:= unicode;
+ InEncoding =:= latin1, OutEncoding =:= utf8;
+ InEncoding =:= unicode, OutEncoding =:= unicode;
+ InEncoding =:= unicode, OutEncoding =:= utf8;
+ InEncoding =:= utf8, OutEncoding =:= unicode;
+ InEncoding =:= utf8, OutEncoding =:= utf8 ->
+ unicode:characters_to_binary(ML,InEncoding);
+
+characters_to_binary_int(ML, InEncoding, OutEncoding) ->
+ {InTrans,Limit} = case OutEncoding of
+ latin1 -> {i_trans_chk(InEncoding),255};
+ _ -> {i_trans(InEncoding),case InEncoding of latin1 -> 255; _ -> 16#10FFFF end}
+ end,
+ OutTrans = o_trans(OutEncoding),
+ Res =
+ ml_map(ML,
+ fun(Part,Accum) when is_binary(Part) ->
+ case InTrans(Part) of
+ List when is_list(List) ->
+ Tail = OutTrans(List),
+ <<Accum/binary, Tail/binary>>;
+ {error, Translated, Rest} ->
+ Tail = OutTrans(Translated),
+ {error, <<Accum/binary,Tail/binary>>, Rest};
+ {incomplete, Translated, Rest, Missing} ->
+ Tail = OutTrans(Translated),
+ {incomplete, <<Accum/binary,Tail/binary>>, Rest,
+ Missing}
+ end;
+ (Part, Accum) when is_integer(Part), Part =< Limit ->
+ case OutTrans([Part]) of
+ Binary when is_binary(Binary) ->
+ <<Accum/binary, Binary/binary>>;
+ {error, _, [Part]} ->
+ {error,Accum,[Part]}
+ end;
+ (Part, Accum) ->
+ {error, Accum, [Part]}
+ end,<<>>),
+ case Res of
+ {incomplete,A,B,_} ->
+ {incomplete,A,B};
+ _ ->
+ Res
+ end.
+
+bom_to_encoding(<<239,187,191,_/binary>>) ->
+ {utf8,3};
+bom_to_encoding(<<0,0,254,255,_/binary>>) ->
+ {{utf32,big},4};
+bom_to_encoding(<<255,254,0,0,_/binary>>) ->
+ {{utf32,little},4};
+bom_to_encoding(<<254,255,_/binary>>) ->
+ {{utf16,big},2};
+bom_to_encoding(<<255,254,_/binary>>) ->
+ {{utf16,little},2};
+bom_to_encoding(Bin) when is_binary(Bin) ->
+ {latin1,0}.
+
+encoding_to_bom(unicode) ->
+ <<239,187,191>>;
+encoding_to_bom(utf8) ->
+ <<239,187,191>>;
+encoding_to_bom(utf16) ->
+ <<254,255>>;
+encoding_to_bom({utf16,big}) ->
+ <<254,255>>;
+encoding_to_bom({utf16,little}) ->
+ <<255,254>>;
+encoding_to_bom(utf32) ->
+ <<0,0,254,255>>;
+encoding_to_bom({utf32,big}) ->
+ <<0,0,254,255>>;
+encoding_to_bom({utf32,little}) ->
+ <<255,254,0,0>>;
+encoding_to_bom(latin1) ->
+ <<>>.
+
+
+cbv(utf8,<<1:1,1:1,0:1,_:5>>) ->
+ 1;
+cbv(utf8,<<1:1,1:1,1:1,0:1,_:4,R/binary>>) ->
+ case R of
+ <<>> ->
+ 2;
+ <<1:1,0:1,_:6>> ->
+ 1;
+ _ ->
+ false
+ end;
+cbv(utf8,<<1:1,1:1,1:1,1:1,0:1,_:3,R/binary>>) ->
+ case R of
+ <<>> ->
+ 3;
+ <<1:1,0:1,_:6>> ->
+ 2;
+ <<1:1,0:1,_:6,1:1,0:1,_:6>> ->
+ 1;
+ _ ->
+ false
+ end;
+cbv(utf8,_) ->
+ false;
+
+cbv({utf16,big},<<A:8>>) when A =< 215; A >= 224 ->
+ 1;
+cbv({utf16,big},<<54:6,_:2>>) ->
+ 3;
+cbv({utf16,big},<<54:6,_:10>>) ->
+ 2;
+cbv({utf16,big},<<54:6,_:10,55:6,_:2>>) ->
+ 1;
+cbv({utf16,big},_) ->
+ false;
+cbv({utf16,little},<<_:8>>) ->
+ 1; % or 3, we'll see
+cbv({utf16,little},<<_:8,54:6,_:2>>) ->
+ 2;
+cbv({utf16,little},<<_:8,54:6,_:2,_:8>>) ->
+ 1;
+cbv({utf16,little},_) ->
+ false;
+
+
+cbv({utf32,big}, <<0:8>>) ->
+ 3;
+cbv({utf32,big}, <<0:8,X:8>>) when X =< 16 ->
+ 2;
+cbv({utf32,big}, <<0:8,X:8,Y:8>>)
+ when X =< 16, ((X > 0) or ((Y =< 215) or (Y >= 224))) ->
+ 1;
+cbv({utf32,big},_) ->
+ false;
+cbv({utf32,little},<<_:8>>) ->
+ 3;
+cbv({utf32,little},<<_:8,_:8>>) ->
+ 2;
+cbv({utf32,little},<<X:8,255:8,0:8>>) when X =:= 254; X =:= 255 ->
+ false;
+cbv({utf32,little},<<_:8,Y:8,X:8>>)
+ when X =< 16, ((X > 0) or ((Y =< 215) or (Y >= 224))) ->
+ 1;
+cbv({utf32,little},_) ->
+ false.
+
+
+ml_map([],_,{{Inc,X},Accum}) ->
+ {incomplete, Accum, Inc, X};
+ml_map([],_Fun,Accum) ->
+ Accum;
+ml_map([Part|_] = Whole,_,{{Incomplete, _}, Accum}) when is_integer(Part) ->
+ {error, Accum, [Incomplete | Whole]};
+ml_map([Part|T],Fun,Accum) when is_integer(Part) ->
+ case Fun(Part,Accum) of
+ Bin when is_binary(Bin) ->
+ case ml_map(T,Fun,Bin) of
+ Bin2 when is_binary(Bin2) ->
+ Bin2;
+ {error, Converted, Rest} ->
+ {error, Converted, Rest};
+ {incomplete, Converted, Rest,X} ->
+ {incomplete, Converted, Rest,X}
+ end;
+ % Can not be incomplete - it's an integer
+ {error, Converted, Rest} ->
+ {error, Converted, [Rest|T]}
+ end;
+ml_map([Part|T],Fun,{{Incomplete,Missing}, Accum}) when is_binary(Part) ->
+ % Ok, how much is needed to fill in the incomplete part?
+ case byte_size(Part) of
+ N when N >= Missing ->
+ <<FillIn:Missing/binary,Trailing/binary>> = Part,
+ NewPart = <<Incomplete/binary,FillIn/binary>>,
+ ml_map([NewPart,Trailing|T], Fun, Accum);
+ M ->
+ NewIncomplete = <<Incomplete/binary, Part/binary>>,
+ NewMissing = Missing - M,
+ ml_map(T,Fun,{{NewIncomplete, NewMissing}, Accum})
+ end;
+ml_map([Part|T],Fun,Accum) when is_binary(Part), byte_size(Part) > 8192 ->
+ <<Part1:8192/binary,Part2/binary>> = Part,
+ ml_map([Part1,Part2|T],Fun,Accum);
+ml_map([Part|T],Fun,Accum) when is_binary(Part) ->
+ case Fun(Part,Accum) of
+ Bin when is_binary(Bin) ->
+ ml_map(T,Fun,Bin);
+ {incomplete, Converted, Rest, Missing} ->
+ ml_map(T,Fun,{{Rest, Missing},Converted});
+ {error, Converted, Rest} ->
+ {error, Converted, [Rest|T]}
+ end;
+ml_map([List|T],Fun,Accum) when is_list(List) ->
+ case ml_map(List,Fun,Accum) of
+ Bin when is_binary(Bin) ->
+ ml_map(T,Fun,Bin);
+ {error, Converted,Rest} ->
+ {error, Converted, [Rest | T]};
+ {incomplete, Converted,Rest,N} ->
+ ml_map(T,Fun,{{Rest,N},Converted})
+ end;
+ml_map(Bin,Fun,{{Incomplete,Missing},Accum}) when is_binary(Bin) ->
+ case byte_size(Bin) of
+ N when N >= Missing ->
+ ml_map([Incomplete,Bin],Fun,Accum);
+ M ->
+ {incomplete, Accum, <<Incomplete/binary, Bin/binary>>, Missing - M}
+ end;
+ml_map(Part,Fun,Accum) when is_binary(Part), byte_size(Part) > 8192 ->
+ <<Part1:8192/binary,Part2/binary>> = Part,
+ ml_map([Part1,Part2],Fun,Accum);
+ml_map(Bin,Fun,Accum) when is_binary(Bin) ->
+ Fun(Bin,Accum).
+
+
+
+
+
+i_trans(latin1) ->
+ fun(Bin) -> binary_to_list(Bin) end;
+i_trans(unicode) ->
+ i_trans(utf8);
+i_trans(utf8) ->
+ fun do_i_utf8/1;
+i_trans(utf16) ->
+ fun do_i_utf16_big/1;
+i_trans({utf16,big}) ->
+ fun do_i_utf16_big/1;
+i_trans({utf16,little}) ->
+ fun do_i_utf16_little/1;
+i_trans(utf32) ->
+ fun do_i_utf32_big/1;
+i_trans({utf32,big}) ->
+ fun do_i_utf32_big/1;
+i_trans({utf32,little}) ->
+ fun do_i_utf32_little/1.
+
+i_trans_chk(latin1) ->
+ fun(Bin) -> binary_to_list(Bin) end;
+i_trans_chk(unicode) ->
+ i_trans_chk(utf8);
+i_trans_chk(utf8) ->
+ fun do_i_utf8_chk/1;
+i_trans_chk(utf16) ->
+ fun do_i_utf16_big_chk/1;
+i_trans_chk({utf16,big}) ->
+ fun do_i_utf16_big_chk/1;
+i_trans_chk({utf16,little}) ->
+ fun do_i_utf16_little_chk/1;
+i_trans_chk(utf32) ->
+ fun do_i_utf32_big_chk/1;
+i_trans_chk({utf32,big}) ->
+ fun do_i_utf32_big_chk/1;
+i_trans_chk({utf32,little}) ->
+ fun do_i_utf32_little_chk/1.
+
+o_trans(latin1) ->
+ fun(L) -> list_to_binary(L) end;
+o_trans(unicode) ->
+ o_trans(utf8);
+o_trans(utf8) ->
+ fun(L) ->
+ do_o_binary(fun(One) ->
+ <<One/utf8>>
+ end, L)
+ end;
+
+o_trans(utf16) ->
+ fun(L) ->
+ do_o_binary(fun(One) ->
+ <<One/utf16>>
+ end, L)
+ end;
+o_trans({utf16,big}) ->
+ o_trans(utf16);
+o_trans({utf16,little}) ->
+ fun(L) ->
+ do_o_binary(fun(One) ->
+ <<One/utf16-little>>
+ end, L)
+ end;
+o_trans(utf32) ->
+ fun(L) ->
+ do_o_binary(fun(One) ->
+ <<One/utf32>>
+ end, L)
+ end;
+o_trans({utf32,big}) ->
+ o_trans(utf32);
+o_trans({utf32,little}) ->
+ fun(L) ->
+ do_o_binary(fun(One) ->
+ <<One/utf32-little>>
+ end, L)
+ end.
+
+do_o_binary(F,L) ->
+ case do_o_binary2(F,L) of
+ {Tag,List,R} ->
+ {Tag,erlang:iolist_to_binary(List),R};
+ List ->
+ erlang:iolist_to_binary(List)
+ end.
+
+do_o_binary2(_F,[]) ->
+ <<>>;
+do_o_binary2(F,[H|T]) ->
+ case (catch F(H)) of
+ {'EXIT',_} ->
+ {error,<<>>,[H|T]};
+ Bin when is_binary(Bin) ->
+ case do_o_binary2(F,T) of
+ {error,Bin2,Rest} ->
+ {error,[Bin|Bin2],Rest};
+ Bin3 ->
+ [Bin|Bin3]
+ end
+ end.
+
+%% Specific functions only allowing codepoints in latin1 range
+
+do_i_utf8_chk(<<>>) ->
+ [];
+do_i_utf8_chk(<<U/utf8,R/binary>>) when U =< 255 ->
+ case do_i_utf8_chk(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf8_chk(<<_/utf8,_/binary>> = Bin) ->
+ {error, [], Bin};
+do_i_utf8_chk(Bin) when is_binary(Bin) ->
+ case cbv(utf8,Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin,N};
+ false ->
+ {error, [], Bin}
+ end.
+do_i_utf16_big_chk(<<>>) ->
+ [];
+do_i_utf16_big_chk(<<U/utf16,R/binary>>) when U =< 255 ->
+ case do_i_utf16_big_chk(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf16_big_chk(<<_/utf16,_/binary>> = Bin) ->
+ {error, [], Bin};
+do_i_utf16_big_chk(Bin) when is_binary(Bin) ->
+ case cbv({utf16,big},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+do_i_utf16_little_chk(<<>>) ->
+ [];
+do_i_utf16_little_chk(<<U/utf16-little,R/binary>>) when U =< 255 ->
+ case do_i_utf16_little_chk(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf16_little_chk(<<_/utf16-little,_/binary>> = Bin) ->
+ {error, [], Bin};
+do_i_utf16_little_chk(Bin) when is_binary(Bin) ->
+ case cbv({utf16,little},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+
+
+do_i_utf32_big_chk(<<>>) ->
+ [];
+do_i_utf32_big_chk(<<U/utf32,R/binary>>) when U =< 255 ->
+ case do_i_utf32_big_chk(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf32_big_chk(<<_/utf32,_/binary>> = Bin) ->
+ {error, [], Bin};
+do_i_utf32_big_chk(Bin) when is_binary(Bin) ->
+ case cbv({utf32,big},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+do_i_utf32_little_chk(<<>>) ->
+ [];
+do_i_utf32_little_chk(<<U/utf32-little,R/binary>>) when U =< 255 ->
+ case do_i_utf32_little_chk(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf32_little_chk(<<_/utf32-little,_/binary>> = Bin) ->
+ {error, [], Bin};
+do_i_utf32_little_chk(Bin) when is_binary(Bin) ->
+ case cbv({utf32,little},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+
+
+%% General versions
+
+do_i_utf8(<<>>) ->
+ [];
+do_i_utf8(<<U/utf8,R/binary>>) ->
+ case do_i_utf8(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf8(Bin) when is_binary(Bin) ->
+ case cbv(utf8,Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin,N};
+ false ->
+ {error, [], Bin}
+ end.
+
+do_i_utf16_big(<<>>) ->
+ [];
+do_i_utf16_big(<<U/utf16,R/binary>>) ->
+ case do_i_utf16_big(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf16_big(Bin) when is_binary(Bin) ->
+ case cbv({utf16,big},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+do_i_utf16_little(<<>>) ->
+ [];
+do_i_utf16_little(<<U/utf16-little,R/binary>>) ->
+ case do_i_utf16_little(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf16_little(Bin) when is_binary(Bin) ->
+ case cbv({utf16,little},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+
+
+do_i_utf32_big(<<>>) ->
+ [];
+do_i_utf32_big(<<U/utf32,R/binary>>) ->
+ case do_i_utf32_big(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf32_big(Bin) when is_binary(Bin) ->
+ case cbv({utf32,big},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.
+do_i_utf32_little(<<>>) ->
+ [];
+do_i_utf32_little(<<U/utf32-little,R/binary>>) ->
+ case do_i_utf32_little(R) of
+ {error,Trans,Rest} ->
+ {error, [U|Trans], Rest};
+ {incomplete,Trans,Rest,N} ->
+ {incomplete, [U|Trans], Rest, N};
+ L when is_list(L) ->
+ [U|L]
+ end;
+do_i_utf32_little(Bin) when is_binary(Bin) ->
+ case cbv({utf32,little},Bin) of
+ N when is_integer(N) ->
+ {incomplete, [], Bin, N};
+ false ->
+ {error, [], Bin}
+ end.